TCM provides a function to work with Emscripten.

Remarks: Make sure Emscripten is installed on your system and check their toolchain file.

You need to provide Emscripten's toolchain to CMake. One way is to pass CMAKE_TOOLCHAIN_FILE "$env{EMROOT}/cmake/Modules/Platform/emscripten.cmake" EMROOT is a variable environment (name may differ) set to the root of emscripten's install directory.

tcm_target_setup_for_emscripten (
        <target>
        [SHELL_FILE <file>]
        [EMBED_DIR <dir>]
        [PRELOAD_DIR <dir>]
)

If EMSCRIPTEN is ON (it is, if using emscripten toolchain), then this target will produce:

a .html file,
a .wasm file,
and a .js file,

If a SHELL_FILE is not provided, then the one embedded in TCM will be used. If EMBED_DIR is specified, then it will be embedded by emscripten. If PRELOAD_DIR is specified, then it will be preloaded by emscripten.

A companion utility target, called ${target}_open_html is also configured to run/open the produced html with emrun.